style.css

* {
  border: none;
  margin: 0;
}
html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
canvas {
  background: white;
  background: radial-gradient(#FFF, #DDD);
  transform-origin: 0 0;
  width: 100%;
  height: 100%;
}
.ui {
  display: none;
  position: fixed;
  z-index: 5;
  bottom: 0;
  left: 0;
  width: 120px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.7);
}
.ui p {
  font-size: 11px;
  font-weight: 700;
}
.ui p.zoom {
  margin-bottom: 5px;
}
.ui p.zoom span {
  margin-right: 5px;
  border: solid 1px #777;
  cursor: pointer;
  border-radius: 2px;
}
.ui p.zoom span.zoomin {
  padding: 2px 5px;
}
.ui p.zoom span.zoomout {
  padding: 2px 8px;
}
.ui p.zoom span:hover {
  background: black;
  color: white;
}

.old {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  cursor: pointer;
  font-family: 'Courier New', Courier, monospace;
}

.old span:hover {
  font-weight: bold;
}

.logo {
  position: absolute;
  margin: auto;
  top: 50%;
  left: 50%;
  text-align: center;
}

.logo-img {
  width: 230px;
  height: 118px;
  margin-left: -115px;
  margin-top: -59px;
  cursor: pointer;

  -webkit-animation: fadein 8s; /* Safari, Chrome and Opera > 12.1 */
     -moz-animation: fadein 8s; /* Firefox < 16 */
      -ms-animation: fadein 8s; /* Internet Explorer */
       -o-animation: fadein 8s; /* Opera < 12.1 */
          animation: fadein 8s;
}

.logo-img:hover {
  -webkit-filter: drop-shadow(1px 1px 1px dodgerblue) drop-shadow(-1px -1px 1px dodgerblue);
  filter: drop-shadow(1px 1px 1px dodgerblue) drop-shadow(-1px -1px 1px dodgerblue);
}

@keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}